Wireless communication apparatus and method

Abstract

A wireless communication apparatus and method are disclosed. The wireless communication method executed by user equipment (UE) comprises the steps that the UE detects a first signal sent by a base station, and the first signal is used for the UE to determine an accessed cell; and / or before performing a random access channel (RAK) procedure, the UE transmits a second signal to the base station.

Description

Technical Field

[0001] The present disclosure relates to the field of communication systems, and more particularly, to a wireless communication apparatus and method that can provide good communication performance and / or high reliability. Background Art

[0002] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multi-access systems include fourth-generation (4G) systems such as long term evolution (LTE) systems, LTE-advanced (LTE-A) systems, or LTE-A pro systems, and fifth-generation (5G) systems that may be referred to as new radio (NR) systems. These systems may employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multi-access communication system may include multiple base stations or network access nodes, each of which simultaneously supports communication of multiple communication devices, which may also be referred to as user equipment (UE).

[0003] In a traditional new radio (NR) system, a base station such as a gNB periodically transmits a synchronization signal block (SSB) and system information block type 1 (SIB1) system information in the system. This may increase network power consumption. Therefore, there is a need for a wireless communication apparatus (such as a UE and / or a base station) and method that can reduce network power consumption. Summary of the Invention

[0004] The object of the present disclosure is to propose a wireless communication device (such as a user equipment (UE) and / or a base station) and a method, which can reduce network power consumption, enable the base station to avoid periodically sending synchronization signal blocks (SSBs) and / or system information, provide good communication performance and / or provide high reliability.

[0005] In a first aspect of the present disclosure, a wireless communication method performed by a UE includes the UE detecting a first signal sent by a base station, where the first signal is used for the UE to determine the cell to access; and / or before performing a random access channel (RACH) procedure, the UE sending a second signal to the base station.

[0006] In some embodiments of the above method according to the first aspect of the present disclosure, if the UE intends to access the cell of the base station, the second signal is used for the base station to assume that it is necessary to send synchronization signal blocks (SSBs) and / or system information.

[0007] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the method further includes, after the UE sends the second signal, the UE assuming that the UE is used to receive SSBs and / or system information from the base station. Optionally, the system information includes system information block type 1 (SIB1) system information.

[0008] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first signal is sent by the base station with a first period, and the SSBs and / or system information are sent by the base station with a second period, and the first period is less than or equal to the second period.

[0009] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first signal includes a first reference signal and / or a second reference signal.

[0010] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first reference signal corresponds to a first index, and / or the second reference signal corresponds to a second index.

[0011] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first reference signal and the second reference signal do not overlap in the time domain.

[0012] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first index is related to a first SSB index, and / or the second index is related to a second SSB index.

[0013] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first reference signal is quasi-co-located (QCL’ed) with the SSB associated with the first SSB index, and / or the second reference signal is QCL’ed with the SSB associated with the second SSB index.

[0014] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first reference signal and / or the second reference signal corresponds to a first index, and the first index is related to the first SSB index.

[0015] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first reference signal and / or the second reference signal is QCL’ed with the SSB associated with the first SSB index.

[0016] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first reference signal corresponds to a first index and a second index, the first index is related to the first SSB index, and the second index is related to the second SSB index; and / or the second reference signal corresponds to a third index and a fourth index, the third index is related to the third SSB index, and the fourth index is related to the fourth SSB index.

[0017] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first reference signal is QCL’ed with the SSB associated with the first SSB index and the second SSB index, and the second reference signal is QCL’ed with the SSB associated with the third SSB index and the fourth SSB index.

[0018] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first reference signal and / or the second reference signal includes one or more symbols, and the one or more symbols include a first symbol and / or a second symbol.

[0019] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first symbol of the first reference signal and / or the second reference signal has a predefined position.

[0020] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the predefined position is related to the position of the primary synchronization signal (PSS) of the SSB.

[0021] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the position of the first symbol of the first reference signal is the same as the PSS position of the SSB of the first SSB index.

[0022] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the position of the first symbol of the second reference signal is the same as the PSS position of the SSB of the second SSB index.

[0023] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the position of the second symbol is related to the position of the first symbol.

[0024] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first symbol and the second symbol are continuous or discontinuous in the time domain.

[0025] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first symbol and / or the second symbol includes the PSS.

[0026] In some embodiments of any of the above methods according to the first aspect of the present disclosure, one of the first symbol and the second symbol includes a first sequence, and the other of the first symbol and the second symbol includes a second sequence.

[0027] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first sequence or the second sequence includes the PSS or the secondary synchronization signal (SSS).

[0028] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first sequence or the second sequence is selected from a set of candidate sequences.

[0029] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the resource blocks (RBs) of the bandwidths of the first sequence and the second sequence are aligned in the frequency domain.

[0030] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the index of the first reference signal or the second reference signal is determined based on the second sequence.

[0031] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the sequences of the set of candidate sequences are associated with indices.

[0032] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the second sequence of the first reference signal is different from the second sequence of the second reference signal.

[0033] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the position of the second signal is determined based on the first signal or the index of the first signal, or the position of the second signal is predefined.

[0034] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the position of the second signal is adjacent to the position of the first signal.

[0035] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the position of the second signal is offset from the position of the first signal by an offset.

[0036] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the offset is known to the UE, or the offset is predefined.

[0037] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the resource of the second signal overlaps or partially overlaps with the SSB symbol position in the time domain.

[0038] In some embodiments of any of the above methods according to the first aspect of the present disclosure, when the UE sends the second signal, the UE assumes a timing advance offset N TA,offset value of the cell of the base station.

[0039] In some embodiments of any of the above methods according to the first aspect of the present disclosure, N TA is equal to 0, and / or N offset is predefined.

[0040] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the value of N TA,offset is determined based on the first symbol and / or the second symbol of the first signal.

[0041] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the first resource of the second signal is associated with the first reference signal, and the second resource of the second signal is associated with the second reference signal.

[0042] In some embodiments of any of the above methods according to the first aspect of the present disclosure, when the UE detects the first reference signal and intends to send the second signal, the UE sends the second signal in the first resource.

[0043] In some embodiments of any of the above methods according to the first aspect of the present disclosure, when the UE detects the second reference signal and intends to send the second signal, the UE sends the second signal in the second resource.

[0044] In some embodiments of any of the above methods according to the first aspect of the present disclosure, after the UE sends the second signal, the UE assumes that the base station sends the SSB and / or system information in a time interval, where the starting position of the time interval is related to the position of the sent second signal or the position of the detected first reference signal.

[0045] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the time interval starts from the next 5 ms half-frame after the second signal is sent.

[0046] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the duration of the time interval is a multiple of 5 ms.

[0047] In some embodiments of any of the above methods according to the first aspect of the present disclosure, after the UE sends the second signal, the UE starts a window / timer to receive the SSB and / or system information sent by the base station.

[0048] In some embodiments of any of the above methods according to the first aspect of the present disclosure, if the UE does not receive the SSB and / or system information sent by the base station in the window / timer, the UE retransmits the second signal or restarts the window / timer.

[0049] In some embodiments of any of the above methods according to the first aspect of the present disclosure, after the UE sends the second signal or after the UE sends the second signal plus a delay, the UE expects to receive the SSB and / or system information sent by the base station.

[0050] In some embodiments of any of the above methods according to the first aspect of the present disclosure, the delay is predefined and is 5 ms or a multiple of 5 ms.

[0051] In a second aspect of the present disclosure, a wireless communication method performed by a base station includes the base station sending a first signal to a user equipment (UE), where the first signal is used for the UE to determine the cell to access; and / or before controlling the UE to perform a random access channel (RACH) procedure, the base station detects a second signal sent by the UE.

[0052] In some embodiments of the above method according to the second aspect of the present disclosure, the second signal is used for the base station to assume that it needs to send a synchronization signal block (SSB) and / or system information.

[0053] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the method further includes, after the base station detects the second signal, the base station sending the SSB and / or system information to the UE. Optionally, the system information includes system information block type 1 (SIB1) system information.

[0054] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the first signal is sent by the base station with a first period, and the SSB and / or system information is sent by the base station with a second period, and the first period is less than or equal to the second period.

[0055] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the first signal includes a first reference signal and / or a second reference signal.

[0056] In some embodiments of any of the above - mentioned methods according to the second aspect of the present disclosure, the first reference signal corresponds to a first index, and / or the second reference signal corresponds to a second index.

[0057] In some embodiments of any of the above - mentioned methods according to the second aspect of the present disclosure, the first reference signal and the second reference signal do not overlap in the time domain.

[0058] In some embodiments of any of the above - mentioned methods according to the second aspect of the present disclosure, the first index is related to a first SSB index, and / or the second index is related to a second SSB index.

[0059] In some embodiments of any of the above - mentioned methods according to the second aspect of the present disclosure, the first reference signal is SSB quasi - co - located (QCL’ed) with the SSB associated with the first SSB index, and / or the second reference signal is SSB QCL’ed with the SSB associated with the second SSB index.

[0060] In some embodiments of any of the above - mentioned methods according to the second aspect of the present disclosure, the first reference signal and / or the second reference signal corresponds to a first index, and the first index is related to a first SSB index.

[0061] In some embodiments of any of the above - mentioned methods according to the second aspect of the present disclosure, the first reference signal and / or the second reference signal is SSB QCL’ed with the SSB associated with the first SSB index.

[0062] In some embodiments of any of the above - mentioned methods according to the second aspect of the present disclosure, the first reference signal corresponds to a first index and a second index, the first index is related to a first SSB index, and the second index is related to a second SSB index; and / or the second reference signal corresponds to a third index and a fourth index, the third index is related to a third SSB index, and the fourth index is related to a fourth SSB index.

[0063] In some embodiments of any of the above - mentioned methods according to the second aspect of the present disclosure, the first reference signal is SSB QCL’ed with the SSB associated with the first SSB index and the second SSB index, and the second reference signal is SSB QCL’ed with the SSB associated with the third SSB index and the fourth SSB index.

[0064] In some embodiments of any of the above - mentioned methods according to the second aspect of the present disclosure, the first reference signal and / or the second reference signal includes one or more symbols, and the one or more symbols include a first symbol and / or a second symbol.

[0065] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the first symbol of the first reference signal and / or the second reference signal has a predefined position.

[0066] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the predefined position is related to the position of the primary synchronization signal (PSS) of the SSB.

[0067] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the position of the first symbol of the first reference signal is the same as the PSS position of the SSB with the first SSB index.

[0068] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the position of the first symbol of the second reference signal is the same as the PSS position of the SSB with the second SSB index.

[0069] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the position of the second symbol is related to the position of the first symbol.

[0070] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the first symbol and the second symbol are continuous or discontinuous in the time domain.

[0071] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the first symbol and / or the second symbol includes the PSS.

[0072] In some embodiments of any of the above methods according to the second aspect of the present disclosure, one of the first symbol and the second symbol includes a first sequence, and the other of the first symbol and the second symbol includes a second sequence.

[0073] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the first sequence or the second sequence includes the PSS or the secondary synchronization signal (SSS).

[0074] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the first sequence or the second sequence is selected from a set of candidate sequences.

[0075] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the resource blocks (RBs) of the bandwidths of the first sequence and the second sequence are aligned in the frequency domain.

[0076] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the index of the first reference signal or the second reference signal is determined based on the second sequence.

[0077] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the sequences in the candidate sequence set are associated with the index.

[0078] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the second sequence of the first reference signal is different from the second sequence of the second reference signal.

[0079] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the position of the second signal is determined based on the first signal or the index of the first signal, or the position of the second signal is predefined.

[0080] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the position of the second signal is adjacent to the position of the first signal.

[0081] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the position of the second signal is offset from the position of the first signal by an offset.

[0082] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the offset is known to the UE, or the offset is predefined.

[0083] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the resource of the second signal overlaps or partially overlaps with the SSB symbol position in the time domain.

[0084] In some embodiments of any of the above methods according to the second aspect of the present disclosure, when the UE transmits the second signal, the UE assumes a timing advance offset N TA,offset value of the cell of the base station.

[0085] In some embodiments of any of the above methods according to the second aspect of the present disclosure, N TA is equal to 0, and / or N offset is predefined.

[0086] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the value of N TA,offset is determined based on the first symbol and / or the second symbol of the first signal.

[0087] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the first resource of the second signal is associated with the first reference signal, and the second resource of the second signal is associated with the second reference signal.

[0088] In some embodiments of any of the above methods according to the second aspect of the present disclosure, after the base station sends a first reference signal to the UE, the base station receives a second signal in a first resource.

[0089] In some embodiments of any of the above methods according to the second aspect of the present disclosure, after the base station sends a second reference signal to the UE, the base station receives a second signal in a second resource.

[0090] In some embodiments of any of the above methods according to the second aspect of the present disclosure, after the base station detects the second signal, the base station sends an SSB and / or system information in a time interval, where the start position of the time interval is related to the position of the sent second signal or the detected first reference signal.

[0091] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the time interval starts from the next 5 ms half-frame after the sent second signal.

[0092] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the duration of the time interval is a multiple of 5 ms.

[0093] In some embodiments of any of the above methods according to the second aspect of the present disclosure, after the base station detects the second signal, a window / timer is started by the UE to receive the SSB and / or system information sent by the base station.

[0094] In some embodiments of any of the above methods according to the second aspect of the present disclosure, if the SSB and / or system information sent by the base station is not received by the UE within the window / timer, the second signal is retransmitted by the UE, or the window / timer is restarted by the UE.

[0095] In some embodiments of any of the above methods according to the second aspect of the present disclosure, after the UE sends the second signal or the second signal plus a delay, the base station sends an SSB and / or system information to the UE.

[0096] In some embodiments of any of the above methods according to the second aspect of the present disclosure, the delay is predefined and is 5 ms or a multiple of 5 ms.

[0097] In a third aspect of the present disclosure, a user equipment includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to execute the above method.

[0098] In a fourth aspect of the present disclosure, a base station includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to execute the above method.

[0099] In a fifth aspect of the present disclosure, a wireless communication device includes a detector configured to detect a first signal transmitted by a base station, where the first signal is used by the detector to determine an accessed cell; and / or a transmitter configured to transmit a second signal to the base station before the detector performs a random access channel (RACH) procedure.

[0100] In a sixth aspect of the present disclosure, a wireless communication device includes a transmitter configured to transmit a first signal to a user equipment (UE), where the first signal is used by the UE to determine an accessed cell; and / or a detector configured to detect a second signal transmitted by the UE before controlling the UE to perform a random access channel (RACH) procedure.

[0101] In a seventh aspect of the present disclosure, instructions are stored on a non-transitory machine-readable storage medium, and when the instructions are executed by a computer, the computer is caused to execute the above method.

[0102] In an eighth aspect of the present disclosure, a chip includes a processor configured to call and run a computer program stored in a memory so that a device in which the chip is installed executes the above method.

[0103] In a ninth aspect of the present disclosure, a computer-readable storage medium stores a computer program that causes a computer to execute the above method.

[0104] In a tenth aspect of the present disclosure, a computer program product includes a computer program, and the computer program causes a computer to execute the above method.

[0105] In an eleventh aspect of the present disclosure, a computer program causes a computer to execute the above method. BRIEF DESCRIPTION OF THE DRAWINGS

[0106] To more clearly illustrate the embodiments of the present disclosure or related technologies, the drawings described in the embodiments will be briefly introduced below. Apparently, the drawings are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0107] Figure 1 is a block diagram of one or more user equipments (UEs) and a base station (e.g., gNB) in a communication network system (e.g., a non-terrestrial network (NTN) or a terrestrial network) according to an embodiment of the present disclosure.

[0108] Figure 2 is a flowchart showing a wireless communication method performed by a user equipment (UE) according to an embodiment of the present disclosure.

[0109] Figure 3 It is a flowchart showing a wireless communication method performed by a base station according to an embodiment of the present disclosure.

[0110] Figure 4 It is a schematic diagram showing an example in which a first signal is transmitted by a base station in a first period, and an SSB and / or system information is transmitted by the base station in a second period according to an embodiment of the present disclosure.

[0111] Figure 5 It is a schematic diagram showing an example in which a first signal is transmitted by a base station in a first period, and an SSB and / or system information is transmitted by the base station in a second period according to another embodiment of the present disclosure.

[0112] Figure 6 It is a flowchart showing an example of a wireless communication method performed by a UE according to an embodiment of the present disclosure.

[0113] Figure 7 It is a flowchart showing an example of a wireless communication method performed by a UE and a base station according to an embodiment of the present disclosure.

[0114] Figure 8 It is a schematic diagram showing an example in which a first reference signal is SSB quasi-co-located (QCL’ed) with a first SSB index, and / or a second reference signal is SSB QCL’ed with a second SSB index.

[0115] Figure 9 It is a schematic diagram showing an example in which a first reference signal and / or a second reference signal is SSB QCL’ed with a first SSB index according to an embodiment of the present disclosure.

[0116] Figure 10 It is a schematic diagram showing an example in which a first reference signal is SSB QCL’ed with a first SSB index and a second SSB index, and a second reference signal is SSB QCL’ed with a third SSB index and a fourth SSB index according to an embodiment of the present disclosure.

[0117] Figure 11 It is a schematic diagram showing an example of a first symbol position and / or a second symbol position according to an embodiment of the present disclosure.

[0118] Figure 12 It is a schematic diagram showing an example in which a first symbol and a second symbol are consecutive in the time domain according to an embodiment of the present disclosure.

[0119] Figure 13 It is a schematic diagram showing an example in which a first symbol and a second symbol are not consecutive in the time domain according to an embodiment of the present disclosure.

[0120] Figure 14It is a schematic diagram showing an example of the resource position of a second signal according to an embodiment of the present disclosure.

[0121] Figure 15 It is a block diagram of a wireless communication device according to an embodiment of the present disclosure.

[0122] Figure 16 It is a block diagram of a wireless communication device according to an embodiment of the present disclosure.

[0123] Figure 17 It is a flowchart showing a wireless communication method performed by a wireless communication device according to an embodiment of the present disclosure.

[0124] Figure 18 It is a flowchart showing a wireless communication method performed by a wireless communication device according to an embodiment of the present disclosure.

[0125] Figure 19 It is a block diagram of a wireless communication system according to an embodiment of the present disclosure. Detailed Description of the Embodiments

[0126] The technical points, structural features, achieved objectives, and effects of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Specifically, the terms in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and do not limit the present disclosure.

[0127] In a traditional New Radio (NR) system, a base station such as a gNB periodically transmits Synchronization Signal Blocks (SSBs) and System Information Block Type 1 (SIB1) system information in the system. The above SSBs and SIB1 system information are used for idle UEs to select a cell to access. More specifically, an idle UE first detects the SSB, and based on the received signal strength, the UE decides to access the base station corresponding to the detected SSB. The SSB consists of four symbols, which include the Primary Synchronization Signal (PSS), the Secondary Synchronization Signal (SSS), and the Physical Broadcast Channel (PBCH). For the PBCH symbol, the PBCH includes the Demodulation Reference Signal (DMRS). For more detailed information about SSBs, please refer to TS38.211 and TS38.213. For example, cell search is a process by which a UE obtains time and frequency synchronization with a cell and detects the physical layer cell ID of the cell. The UE receives the following synchronization signals (SS) to perform cell search: PSS and SSS defined in [4, TS 38.211]. The UE assumes that the reception timing of the PBCH, PSS, and SSS is in consecutive symbols, as defined in [4, TS 38.211], and forms an SS / PBCH block. An SSB burst contains at most L SSBs, where the value of L depends on the subcarrier spacing. Each SSB has a dedicated symbol position within a 5 ms half-frame, and each SSB has a dedicated SSB index. Once the UE detects the SSB and determines the SSB index, the UE can also determine the symbol position within the half-frame. In addition, the PBCH contains Master Information Block (MIB) information, which further provides necessary information for the UE to determine the position of Control Resource Set (CORESET) 0 and the position of the search space set of Physical Downlink Control Channel (PDCCH) of type 0.

[0128] In a future greenfield network, to reduce network power consumption, it is possible to avoid periodically transmitting SSBs and / or SIB1. Instead, the base station can transmit SSBs and / or SIB1 only when needed. For example, when at least one idle UE requires transmission from the base station. In some embodiments of the present disclosure, the proposed exemplary method allows the base station to reduce transmission when SSBs and / or SIB1 transmission is not required, so as to reduce network power consumption.

[0129] Figure 1Illustrated are one or more user equipments (UEs) 10 and a base station (e.g., gNB) 20 that provide transmission adjustment in a communication network system 30 (e.g., non-terrestrial network (NTN) or terrestrial network) according to embodiments of the present disclosure in some embodiments. The communication network system 30 includes one or more UEs 10 and a base station 20. The one or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11 or 21 may be used to implement the proposed functions, processes, and / or methods described in this specification. The radio interface protocol layer may be implemented in the processor 11 or 21. The memory 12 or 22 is operatively coupled to the processor 11 or 21 and stores various information to operate the processor 11 or 21. The transceiver 13 or 23 is operatively coupled to the processor 11 or 21, and the transceiver 13 or 23 transmits and / or receives radio signals.

[0130] The processor 11 or 21 may include an application-specific integrated circuit (ASIC), other chip sets, logic circuits, and / or data processing devices. The memory 12 or 22 may include a read-only memory (ROM), a random access memory (RAM), a flash memory, a memory card, a storage medium, and / or other storage devices. The transceiver 13 or 23 may include baseband circuitry to process radio frequency signals. When the embodiments are implemented in software, the techniques described herein may be implemented by modules (e.g., procedures, functions, etc.) that execute the functions described herein. The modules may be stored in the memory 12 or 22 and executed by the processor 11 or 21. The memory 12 or 22 may be implemented inside or outside the processor 11 or 21, and in this case, the memory 12 or 22 may be communicatively coupled to the processor 11 or 21 via various means known in the art.

[0131] In some embodiments, the processor 11 is used to detect a first signal sent by the base station 20, where the first signal is used for the processor 11 to determine the accessed cell; and / or the transceiver 13 is used to send a second signal to the base station 20 before the processor 11 executes a random access channel (RACH) procedure. Optionally, the system information includes system information block type 1 (SIB1) system information. This can reduce network power consumption, enable the base station to avoid periodically sending synchronization signal blocks (SSBs) and / or system information, provide good communication performance and / or provide high reliability.

[0132] In some embodiments, the transceiver 23 is used to send a first signal to the UE 10, where the first signal is used for the UE 10 to determine the cell to access; and / or the processor 21 is used to detect a second signal sent by the UE 10 before controlling the UE 10 to perform a random access channel (RACH) procedure. Optionally, the system information includes system information block type 1 (SIB1) system information. This can reduce network power consumption, enable the base station to avoid periodically sending synchronization signal blocks (SSBs) and / or system information, provide good communication performance and / or provide high reliability.

[0133] Figure 2 A wireless communication method 200 performed by a UE according to an embodiment of the present disclosure is shown. In some embodiments, the method 200 includes: block 202, the UE detects a first signal sent by the base station, where the first signal is used for the UE to determine the cell to access; and / or block 204, before performing a random access channel (RACH) procedure, the UE sends a second signal to the base station. Optionally, the system information includes system information block type 1 (SIB1) system information. This can reduce network power consumption, enable the base station to avoid periodically sending synchronization signal blocks (SSBs) and / or system information, provide good communication performance and / or provide high reliability.

[0134] Figure 3 A wireless communication method 300 performed by a base station according to an embodiment of the present disclosure is shown. In some embodiments, the method 300 includes: block 302, the base station sends a first signal to a user equipment (UE), where the first signal is used for the UE to determine the cell to access; and / or block 304, before controlling the UE to perform a random access channel (RACH) procedure, the base station detects a second signal sent by the UE. Optionally, the system information includes system information block type 1 (SIB1) system information. This can reduce network power consumption, enable the base station to avoid periodically sending synchronization signal blocks (SSBs) and / or system information, provide good communication performance and / or provide high reliability.

[0135] The examples given in this disclosure can be applied to Internet of Things (IoT) devices or Narrowband Internet of Things (NB-IoT) UEs in a non-terrestrial network (NTN) system. However, the method is not limited to NTN systems, nor to IoT devices or NB-IoT UEs. The examples given in this disclosure can be applied to NR systems, LTE systems, or NB-IoT systems. In addition, in some examples of this disclosure, in an NB-IoT system, the Physical Downlink Control Channel (PDCCH) is equivalent to the NB-PDCCH (NPDCCH), and the Physical Downlink Shared Channel (PDSCH) is equivalent to the NB-PDSCH (NPDSCH).

[0136] Example:

[0137] Figure 4 and Figure 5 respectively show examples in which a first signal is transmitted by a base station in a first period, and an SSB and / or system information is transmitted by the base station in a second period according to an embodiment of the present disclosure. Figure 4 and Figure 5 show that in some embodiments, from the base station side, the base station can use the second period to transmit the SSB and / or SIB1. In addition, the base station can transmit the first signal in the first period. Optionally, as shown in Figure 4 , the second period is less than the first period. Optionally, as shown in Figure 5 , the second period is equal to the first period. The large-period SSB and / or SIB1 can reduce network power consumption, and the first signal is used for an idle UE to detect the presence of a cell and allows the idle UE to obtain the Reference Signal Received Power (RSRP) of the cell or the cell signal strength for cell selection. Optionally, the base station can only transmit the first signal without transmitting the SSB and / or SIB1 in the default mode.

[0138] Figure 6 shows an example of a wireless communication method performed by a UE according to an embodiment of the present disclosure. Figure 6 shows that in some embodiments, when an idle UE detects the first signal and if the UE intends to access the base station, the UE can send a second signal to the base station. In addition, the UE assumes that the base station is used to transmit the SSB and / or SIB1 after the UE sends the second signal. This achieves the goal of transmitting the SSB and / or SIB1 only when needed. Figure 7 shows an example of a wireless communication method performed by a UE and a base station according to an embodiment of the present disclosure. Figure 7It shows that in some embodiments, when an idle UE detects a first signal and if the UE intends to access the base station, the UE may send a second signal to the base station. After the base station detects the second signal, the base station may assume that it is necessary to send the SSB and / or SIB1. Then the base station may start sending the SSB and / or SIB1, which achieves the goal of transmitting the SSB and / or SIB1 only when needed.

[0139] Figure 8 It shows an example where the first reference signal is SSB quasi - co - located (QCL’ed) with the first SSB index, and / or the second reference signal is SSB QCL’ed with the second SSB index. In some examples, the first signal includes the first reference signal and / or the second reference signal. The first reference signal corresponds to the first index, and the second reference signal corresponds to the second index. The first reference signal and the second reference signal do not overlap in the time domain. In some examples, the first index is related to the first SSB index, and the second index is related to the second SSB index. Thus, the first reference signal is SSB QCL’ed with the first SSB index. The second reference signal is SSB QCL’ed with the second SSB index. Therefore, by detecting the first reference signal and / or the second reference signal, the UE can obtain the downlink QCL assumption without directly detecting the SSB and / or SIB1. This enables the base station to avoid periodically sending the SSB and / or SIB1.

[0140] Figure 9 It shows an example where the first reference signal and / or the second reference signal is SSB QCL’ed with the first SSB index according to an embodiment of the present disclosure. In some embodiments, the first reference signal and / or the second reference signal corresponds to the first index, and the first index is related to the first SSB index. In some embodiments, the first reference signal and / or the second reference signal is SSB QCL’ed with the first SSB index. Therefore, by detecting the first reference signal and / or the second reference signal, the UE can obtain the downlink QCL assumption without directly detecting the SSB and / or SIB1. This enables the base station to avoid periodically sending the SSB and / or SIB1.

[0141] Figure 10An example is shown where a first reference signal associated with a first SSB index and a second SSB index is SSB QCL’ed, and a second reference signal associated with a third SSB index and a fourth SSB index is SSB QCL’ed according to an embodiment of the present disclosure. In some embodiments, the first reference signal corresponds to a first index and a second index, the first index is related to the first SSB index, and the second index is related to the second SSB index; and / or the second reference signal corresponds to a third index and a fourth index, the third index is related to the third SSB index, and the fourth index is related to the fourth SSB index. In some embodiments, the first reference signal is SSB QCL’ed with the first SSB index and the second SSB index, and the second reference signal is SSB QCL’ed with the third SSB index and the fourth SSB index. Thus, by detecting the first reference signal and / or the second reference signal, the UE can obtain the downlink QCL assumption without directly detecting the SSB and / or SIB1. This enables the base station to avoid periodically transmitting the SSB and / or SIB1.

[0142] Figure 11 An example of a first symbol position and / or a second symbol position according to an embodiment of the present disclosure is shown. Figure 12 An example is shown where a first symbol and a second symbol are consecutive in the time domain according to an embodiment of the present disclosure. Figure 13 An example is shown where a first symbol and a second symbol are non - consecutive in the time domain according to an embodiment of the present disclosure. Figures 11 to 13 In some examples, the reference signal includes at least one or more symbols. The one or more symbols include at least a first symbol and / or a second symbol. The first symbol has a predefined position. The predefined position is related to the PSS position of the SSB. In some examples, the position of the first symbol of the first reference signal is the same as the PSS position of the SSB of the first SSB index. The first symbol of the second reference signal is the same as the PSS position of the SSB of the second SSB index. In some examples, the second symbol position is related to the first symbol position. In some examples, the first symbol and the second symbol are consecutive in the time domain (as Figure 12 shown) or non - consecutive in the time domain (as Figure 13 shown). In some examples, Figure 11 it is shown that the first symbol is related to the first symbol of the SSB. In some examples, Figure 13Disclosed are symbols with discontinuous intervals less than or equal to 4 SSBs. In some examples, the first symbol or the second symbol is the first sequence. In some examples, the first symbol and / or the second symbol is the PSS. In some examples, the first symbol or the second symbol is the second sequence. The first sequence or the second sequence is selected from a set of candidate sequences. The first sequence or the second sequence is the PSS or the SSS. In some examples, the second symbol is sequence-based, where the sequence is selected from a set of candidate sequences. In some examples, the index of the reference signal is determined based on the sequence of the second symbol. In some examples, the sequence of the second symbol of the first reference signal is different from the sequence of the second symbol of the second reference signal. In some examples, the resource blocks (RBs) of the bandwidths of the first sequence and the second sequence are aligned in the frequency domain.

[0143] Figure 14 Illustrated is an example of the resource location of the second signal according to an embodiment of the present disclosure. Figure 14 Illustrated is that in some examples, the second signal is from the UE to the base station. The resource location of the second signal is determined based on the first signal. The resource location of the second signal is predefined. In some examples, the location of the second signal is adjacent to the location of the first signal. Optionally, the location of the second signal is offset from the location of the first signal by an offset. In some examples, the offset is known to the UE, or the offset is predefined. In some examples, the resources of the second signal overlap or partially overlap with the SSB symbol location in the time domain. When the UE transmits the second signal in the second signal resources, the UE assumes N according to Section 4.2 of TS213 TA,offset for the default value of N TA = 0, and / or N offset is predefined. For example, the value of N for the timing advance offset of the serving cell can be provided to the UE through the n-TimingAdvanceOffset of the serving cell TA,offset . If the n-TimingAdvanceOffset of the serving cell is not provided to the UE, the UE determines the default value of N for the timing advance offset of the serving cell as described in [10, TS 38.133 TA,offset . Optionally, the value of N TA,offset is determined based on the first symbol and / or the second symbol of the first signal. In some examples, the first resource of the second signal is associated with the first reference signal, and the second resource of the second signal is associated with the second reference signal. When the UE detects the first reference signal and intends to transmit the second signal, the UE may transmit the second signal in the first resource. Optionally, when the UE detects the second reference signal and intends to transmit the second signal, the UE may transmit the second signal in the second resource.

[0144] In some examples, after the UE sends the second signal, the UE may assume that the base station can send the SSB and / or SIB1 in a time interval, where the start position of the time interval is related to the position of the sent second signal or the position of the detected first reference signal. In some examples, the time interval starts from the next 5 ms half-frame after the sent second signal. In some examples, the duration of the time interval is a multiple of 5 ms.

[0145] In some examples, after the UE sends the second signal, the UE starts a window / timer to receive the SSB and / or system information sent by the base station. In some examples, if the UE does not receive the SSB and / or system information sent by the base station in the window / timer, the UE retransmits the second signal or restarts the window / timer. In some examples, after the UE sends the second signal or after the UE sends the second signal plus a delay, the UE expects to receive the SSB and / or system information sent by the base station. In some examples, the delay is predefined and is 5 ms or a multiple of 5 ms.

[0146] Figure 15 A wireless communication device 1500 according to an embodiment of the present disclosure is shown. The wireless communication device 1500 includes a detector 1501 for detecting a first signal sent by a base station, where the first signal is used for the detector 1501 to determine the accessed cell; and / or a transmitter 1502 for sending a second signal to the base station before the detector 1501 performs a random access channel (RACH) procedure. This can reduce network power consumption, enable the base station to avoid periodically sending synchronization signal blocks (SSBs) and / or system information, provide good communication performance, and / or provide high reliability.

[0147] Figure 16 A wireless communication device 1600 according to an embodiment of the present disclosure is shown. The wireless communication device 1600 includes a transmitter 1601 for sending a first signal to a user equipment (UE), where the first signal is used for the UE to determine the accessed cell; and / or a detector 1602 for detecting a second signal sent by the UE before controlling the UE to perform a random access channel (RACH) procedure. This can reduce network power consumption, enable the base station to avoid periodically sending synchronization signal blocks (SSBs) and / or system information, provide good communication performance, and / or provide high reliability.

[0148] Figure 17The wireless communication method 1700 performed by a wireless communication device according to an embodiment of the present disclosure is shown. In some embodiments, the method 1700 includes: block 1702, where the wireless communication device detects a first signal sent by a base station, and the first signal is used for the wireless communication device to determine the cell to access; and / or block 1704, before performing a random access channel (RACH) procedure, the wireless communication device sends a second signal to the base station. Optionally, the system information includes system information block type 1 (SIB1) system information. This can reduce network power consumption, enable the base station to avoid periodically sending synchronization signal blocks (SSBs) and / or system information, provide good communication performance and / or provide high reliability. The wireless communication device may be a UE.

[0149] Figure 18 The wireless communication method 1800 performed by a wireless communication device according to an embodiment of the present disclosure is shown. In some embodiments, the method 1800 includes: block 1802, where the wireless communication device sends a first signal to a user equipment (UE), and the first signal is used for the UE to determine the cell to access; and / or block 1804, before controlling the UE to perform a random access channel (RACH) procedure, the wireless communication device detects a second signal sent by the UE. Optionally, the system information includes system information block type 1 (SIB1) system information. This can reduce network power consumption, enable the base station to avoid periodically sending synchronization signal blocks (SSBs) and / or system information, provide good communication performance and / or provide high reliability. The wireless communication device may be a base station.

[0150] In some embodiments, if the UE intends to access the cell of the base station, the second signal is used for the base station to assume that it needs to send a synchronization signal block (SSB) and / or system information. In some embodiments, the method further includes after the UE sends the second signal, the UE assumes that the UE is used to receive the SSB and / or system information from the base station. Optionally, the system information includes system information block type 1 (SIB1) system information. In some embodiments, the first signal is sent by the base station at a first period, and the SSB and / or system information are sent by the base station at a second period, and the first period is less than or equal to the second period. In some embodiments, the first signal includes a first reference signal and / or a second reference signal. In some embodiments, the first reference signal corresponds to a first index, and / or the second reference signal corresponds to a second index.

[0151] In some embodiments, the first reference signal and the second reference signal do not overlap in the time domain. In some embodiments, the first index is related to the first SSB index, and / or the second index is related to the second SSB index. In some embodiments, the first reference signal is SSB quasi co-located (QCL’ed) with the SSB associated with the first SSB index, and / or the second reference signal is SSB QCL’ed with the SSB associated with the second SSB index. In some embodiments, the first reference signal and / or the second reference signal corresponds to the first index, and the first index is related to the first SSB index. In some embodiments, the first reference signal and / or the second reference signal is SSB QCL’ed with the SSB associated with the first SSB index. In some embodiments, the first reference signal corresponds to the first index and the second index, the first index is related to the first SSB index, and the second index is related to the second SSB index; and / or the second reference signal corresponds to the third index and the fourth index, the third index is related to the third SSB index, and the fourth index is related to the fourth SSB index.

[0152] In some embodiments, the first reference signal is SSB QCL’ed with the SSB associated with the first SSB index and the second SSB index, and the second reference signal is SSB QCL’ed with the SSB associated with the third SSB index and the fourth SSB index. In some embodiments, the first reference signal and / or the second reference signal includes one or more symbols, and the one or more symbols include the first symbol and / or the second symbol. In some embodiments, the first symbol of the first reference signal and / or the second reference signal has a predefined position. In some embodiments, the predefined position is related to the position of the primary synchronization signal (PSS) of the SSB. In some embodiments, the position of the first symbol of the first reference signal is the same as the PSS position of the SSB of the first SSB index. In some embodiments, the position of the first symbol of the second reference signal is the same as the PSS position of the SSB of the second SSB index.

[0153] In some embodiments, the position of the second symbol is related to the position of the first symbol. In some embodiments, the first symbol and the second symbol are continuous in the time domain, or are discontinuous in the time domain. In some embodiments, the first symbol and / or the second symbol includes the PSS. In some embodiments, one of the first symbol and the second symbol includes the first sequence, and the other of the first symbol and the second symbol includes the second sequence. In some embodiments, the first sequence or the second sequence includes the PSS or the secondary synchronization signal (SSS). In some embodiments, the first sequence or the second sequence is selected from a set of candidate sequences. In some embodiments, the resource blocks (RBs) of the bandwidths of the first sequence and the second sequence are aligned in the frequency domain. In some embodiments, the index of the first reference signal or the second reference signal is determined based on the second sequence. In some embodiments, the sequences of the set of candidate sequences are associated with the index.

[0154] In some embodiments, the second sequence of the first reference signal is different from the second sequence of the second reference signal. In some embodiments, the position of the second signal is determined based on the first signal or an index of the first signal, or the position of the second signal is predefined. In some embodiments, the position of the second signal is adjacent to the position of the first signal. In some embodiments, the position of the second signal is offset from the position of the first signal by an offset. In some embodiments, the offset is known to the UE, or the offset is predefined. In some embodiments, the resource of the second signal overlaps or partially overlaps with the SSB symbol position in the time domain. In some embodiments, when the UE transmits the second signal, the UE assumes a timing advance offset N TA,offset of the cell of the base station. In some embodiments, N TA is equal to 0, and / or N offset is predefined.

[0155] In some embodiments, the value of N TA,offset is determined based on the first symbol and / or the second symbol of the first signal. In some embodiments, the first resource of the second signal is associated with the first reference signal, and the second resource of the second signal is associated with the second reference signal. In some embodiments, when the UE detects the first reference signal and intends to transmit the second signal, the UE transmits the second signal in the first resource. In some embodiments, when the UE detects the second reference signal and intends to transmit the second signal, the UE transmits the second signal in the second resource. In some embodiments, after the UE transmits the second signal, the UE assumes that the base station transmits the SSB and / or system information in a time interval, where the start position of the time interval is related to the position of the transmitted second signal or the detected first reference signal position. In some embodiments, the time interval starts from the next 5 ms half-frame after the transmitted second signal. In some embodiments, the duration of the time interval is a multiple of 5 ms.

[0156] In some embodiments, after the UE transmits the second signal, the UE starts a window / timer to receive the SSB and / or system information transmitted by the base station. In some embodiments, if the UE does not receive the SSB and / or system information transmitted by the base station in the window / timer, the UE retransmits the second signal or restarts the window / timer. In some embodiments, after the UE transmits the second signal or after the UE transmits the second signal with a delay, the UE expects to receive the SSB and / or system information transmitted by the base station. In some embodiments, the delay is predefined and is 5 ms or a multiple of 5 ms.

[0157] The commercial benefits of some embodiments are as follows. 1. Reduce network power consumption. 2. Enable the base station to avoid periodically transmitting synchronization signal blocks (SSBs) and / or system information. 3. Provide good communication performance. 4. Provide high reliability. 5. Some embodiments of the present disclosure are provided by 5G-NR chipset suppliers, V2X communication system development suppliers, automobile manufacturers (including automobiles, trains, trucks, buses, bicycles, motorcycles, helmets, etc.), drones (unmanned aerial vehicles), smart phone manufacturers, communication devices for public safety purposes, and AR / VR / MR device manufacturers (such as for gaming, conferences / seminars, educational purposes). Some embodiments of the present disclosure are combinations of "technologies / processes" that can be adopted in 3GPP specifications to create end products. Some embodiments of the present disclosure can be adopted in 5G NR licensed and unlicensed or shared spectrum communications. Some embodiments of the present disclosure propose technical mechanisms.

[0158] Figure 19 FIG. 4 is a block diagram of an example system 700 for wireless communication in accordance with embodiments of the present disclosure. The embodiments described herein can be implemented in communication system 700 using any appropriately configured hardware and / or software. Figure 19 FIG. 5 illustrates communication system 700, which includes at least radio frequency (RF) circuitry 710, baseband circuitry 720, application circuitry 730, memory / storage 740, display 750, camera 760, sensors 770, and input / output (I / O) interface 780 coupled to each other as shown. Application circuitry 730 can include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processors can include any combination of general-purpose processors and dedicated processors such as graphics processors, application processors. The processors can be coupled to memory / storage and are configured to execute instructions stored in memory / storage to enable various applications and / or operating systems to run on the system.

[0159] The baseband circuit 720 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processor may include a baseband processor. The baseband circuit may handle various radio control functions that enable communication with one or more radio networks via the RF circuit. The radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc. In some embodiments, the baseband circuit may provide communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuit may support communication with an evolved universal terrestrial radio access network (EUTRAN) and / or other wireless metropolitan area network (WMAN), wireless local area network (WLAN), wireless personal area network (WPAN). Embodiments in which the baseband circuit is used to support radio communication for more than one wireless protocol may be referred to as multi-mode baseband circuits.

[0160] In various embodiments, the baseband circuit 720 may include circuitry for operating signals that are not strictly baseband frequencies. For example, in some embodiments, the baseband circuit may include circuitry for operating signals having an intermediate frequency that is between the baseband frequency and the radio frequency. The RF circuit 710 may communicate with a wireless network using modulated electromagnetic radiation via a non-solid medium. In various embodiments, the RF circuit may include switches, filters, amplifiers, etc. to facilitate communication with the wireless network. In various embodiments, the RF circuit 710 may include circuitry for operating signals that are not strictly radio frequencies. For example, in some embodiments, the RF circuit may include circuitry for operating signals having an intermediate frequency that is between the baseband frequency and the radio frequency.

[0161] In various embodiments, the above with respect to the user equipment, eNB, or gNB may be embodied, in whole or in part, in one or more of the RF circuitry, baseband circuitry, and / or application circuitry. As used herein, "circuitry" may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group of processors), and / or a memory (shared, dedicated, or group of memories) that executes one or more software or firmware programs, may refer to a combinatorial logic circuit and / or other suitable hardware components that provide the described functionality, or may refer to a portion of the above or include a portion of the above. In some embodiments, the electronic device circuitry may be implemented in one or more software or firmware modules, or the functionality associated with the circuitry may be implemented by one or more software or firmware modules. In some embodiments, some or all of the components of the baseband circuitry, application circuitry, and / or memory / storage device may be implemented together on a system on a chip (SOC). The memory / storage device 740 may be used to load and store (e.g., for the system) data and / or instructions. The memory / storage device of one embodiment may include any combination of suitable volatile memory (such as dynamic random access memory (DRAM)) and / or non-volatile memory (such as flash memory).

[0162] In various embodiments, the I / O interface 780 may include one or more user interfaces designed to enable a user to interact with the system and / or a peripheral component interface designed to enable peripheral components to interact with the system. The user interface may include, but is not limited to, a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc. The peripheral component interface may include, but is not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power interface. In various embodiments, the sensor 770 may include one or more sensing devices to determine environmental conditions and / or location information related to the system. In some embodiments, the sensor may include, but is not limited to, a gyroscope sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit. The positioning unit may also be part of the baseband circuitry and / or RF circuitry, or interact with the baseband circuitry and / or RF circuitry to communicate with components of a positioning network (such as global positioning system (GPS) satellites).

[0163] In various embodiments, the display 750 may include a display such as a liquid crystal display and a touch screen display. In various embodiments, the system 700 may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, AR / VR glasses, etc. In various embodiments, the system may have more or fewer components and / or a different architecture. Where appropriate, the methods described herein may be implemented as a computer program. The computer program may be stored on a storage medium, such as a non-transitory storage medium.

[0164] Those of ordinary skill in the art understand that each unit, algorithm, and step described and disclosed in the embodiments of the present disclosure is implemented using a combination of electronic hardware or electronic hardware and software for a computer. Whether these functions run in hardware or software depends on the application conditions and design requirements of the technical solution. Those of ordinary skill in the art can use different ways to implement the functions of each specific application, and these implementations should not exceed the scope of the present disclosure. Those of ordinary skill in the art can understand that he / she can refer to the working processes of the systems, devices, and units in the above embodiments because the working processes of the above systems, devices, and units are basically the same. For the sake of description and brevity, these working processes will not be described in detail.

[0165] It should be understood that the systems, devices, and methods disclosed in the embodiments of the present disclosure may be implemented in other ways. The above embodiments are merely exemplary. The division of units is only based on logical functions, and there are other divisions in implementation. Multiple units or components may be combined or integrated into another system. It is also possible to omit or skip certain features. On the other hand, the mutually coupled, directly coupled, or communicatively coupled shown or discussed can be realized indirectly or communicatively in any form, whether electrical, mechanical, or other types, through some ports, devices, or units.

[0166] The units used as separate components for illustration are physically separated or not. The units for display are physical units or not, that is, located in one place or distributed on multiple network units. Part or all of the units are used according to the purpose of the embodiment. In addition, each functional unit in each embodiment may be integrated into one processing unit, may be physically independent, or integrated with two or more units into one processing unit.

[0167] If a software functional unit is implemented, used, and sold as a product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution proposed in this disclosure can be substantially or partially implemented in the form of a software product. Alternatively, a part of the technical solution beneficial to traditional technologies can be implemented in the form of a software product. The software product in a computer is stored in a storage medium, which includes a plurality of commands for a computing device (such as a personal computer, a server, or a network device) to execute all or part of the steps disclosed in the embodiments of this disclosure. The storage medium includes a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a floppy disk, or other media capable of storing program codes.

[0168] Although this disclosure has been described in connection with the embodiments that are considered to be the most practical and the most preferred, it should be understood that this disclosure is not limited to the disclosed embodiments, but is intended to cover various arrangements made without departing from the broadest scope of interpretation of the appended claims.

Claims

1. A wireless communication method performed by a user equipment (UE), comprising: The UE detecting a first signal sent by a base station, wherein the first signal is used for the UE to determine the cell to access; and / or Before performing a random access channel (RACH) procedure, the UE sending a second signal to the base station.

2. The method according to claim 1, wherein If the UE intends to access the cell of the base station, the second signal is used for the base station to assume that it needs to send a synchronization signal block (SSB) and / or system information.

3. The method according to claim 1, further comprising, after the UE sends the second signal, the UE assuming that the UE is used to receive the SSB and / or the system information from the base station.

4. The method according to any one of claims 1 to 3, wherein, The first signal is sent by the base station in a first period, and the SSB and / or the system information are sent by the base station in a second period, and the first period is less than or equal to the second period.

5. The method according to any one of claims 1 to 4, wherein The first signal includes a first reference signal and / or a second reference signal.

6. The method according to claim 5, wherein The first reference signal corresponds to a first index, and / or the second reference signal corresponds to a second index.

7. The method according to claim 5 or 6, wherein, The first reference signal and the second reference signal do not overlap in the time domain.

8. The method according to claim 6 or 7, wherein The first index is related to a first SSB index, and / or the second index is related to a second SSB index.

9. The method according to claim 8, wherein The first reference signal is quasi-co-located (QCL’ed) with the SSB associated with the first SSB index, and / or the second reference signal is QCL’ed with the SSB associated with the second SSB index.

10. The method according to any one of claims 5 to 9, wherein, The first reference signal and / or the second reference signal includes one or more symbols, and the one or more symbols include a first symbol and / or a second symbol.

11. The method according to claim 10, wherein, The first symbol of the first reference signal and / or the second reference signal has a predefined position, and / or the predefined position is related to the position of the primary synchronization signal (PSS) of the SSB.

12. The method according to claim 11, wherein, The position of the first symbol of the first reference signal is the same as the PSS position of the SSB of the first SSB index, and / or the position of the first symbol of the second reference signal is the same as the PSS position of the SSB of the second SSB index.

13. The method according to claim 11 or 12, wherein, The first symbol and / or the second symbol includes a PSS.

14. The method according to any one of claims 1 to 13, wherein, The position of the second signal is determined based on the first signal or the index of the first signal, or the position of the second signal is predefined.

15. The method according to any one of claims 1 to 14, wherein, When the UE transmits the second signal, the UE assumes a timing advance offset N of the cell of the base station. TA,offset value.

16. The method according to any one of claims 5 to 15, wherein, After the UE sends the second signal, the UE assumes that the base station sends the SSB and / or the system information in a time interval, wherein the starting position of the time interval is related to the position of the sent second signal or the detected first reference signal.

17. The method according to claim 16, wherein, The time interval starts from the next 5 ms half-frame after the sent second signal, and / or the duration of the time interval is a multiple of 5 ms.

18. A wireless communication method performed by a base station, comprising: The base station sending a first signal to a user equipment (UE), wherein the first signal is used for the UE to determine the cell to access; and / or Before controlling the UE to perform a random access channel (RACH) procedure, the base station detects a second signal transmitted by the UE.

19. A user equipment (UE) includes: A memory; A transceiver; And A processor coupled to the memory and the transceiver; wherein the processor is configured to detect a first signal transmitted by a base station, where the first signal is used by the processor to determine an accessed cell; and / or wherein the transceiver is configured to transmit a second signal to the base station before the processor performs a random access channel (RACH) procedure.

20. A wireless communication device includes: A detector configured to detect a first signal transmitted by a base station, where the first signal is used by the detector to determine an accessed cell; and / or A transmitter configured to transmit a second signal to the base station before the detector performs a random access channel (RACH) procedure.

21. A base station includes: A memory; A transceiver; And A processor coupled to the memory and the transceiver; wherein the transceiver is configured to transmit a first signal to a user equipment (UE), where the first signal is used by the UE to determine an accessed cell; and / or wherein the processor is configured to detect a second signal transmitted by the UE before controlling the UE to perform a random access channel (RACH) procedure.

22. A wireless communication device includes: A transmitter configured to transmit a first signal to a user equipment (UE), where the first signal is used by the UE to determine an accessed cell; and / or A detector configured to detect a second signal transmitted by the UE before controlling the UE to perform a random access channel (RACH) procedure.

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